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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "TextFile.hxx"
#include "fs/Path.hxx"
#include "fs/FileSystem.hxx"
#include <glib.h>
#include <assert.h>
#include <string.h>
TextFile::TextFile(Path path_fs)
:file(FOpen(path_fs, FOpenMode::ReadText)),
buffer(g_string_sized_new(step)) {}
TextFile::~TextFile()
{
if (file != nullptr)
fclose(file);
g_string_free(buffer, true);
}
char *
TextFile::ReadLine()
{
gsize length = 0, i;
char *p;
assert(file != nullptr);
assert(buffer != nullptr);
assert(buffer->allocated_len >= step);
while (buffer->len < max_length) {
p = fgets(buffer->str + length,
buffer->allocated_len - length, file);
if (p == nullptr) {
if (length == 0 || ferror(file))
return nullptr;
break;
}
i = strlen(buffer->str + length);
length += i;
if (i < step - 1 || buffer->str[length - 1] == '\n')
break;
g_string_set_size(buffer, length + step);
}
/* remove the newline characters */
if (buffer->str[length - 1] == '\n')
--length;
if (buffer->str[length - 1] == '\r')
--length;
g_string_set_size(buffer, length);
return buffer->str;
}
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